All-glass micro-groove light guide plate by mask and etch

Quesada, Mark A.; Senaratne, Wageesha; Li, Shenping; Sullivan, Andy

doi:10.1364/ome.414102

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…Its uniformity was nearly 1.65 times that of the LGP without microstructures. The uniformity obtained by this result was better than the result in several references [ 13 , 23 , 27 , 31 , 46 ] and was slightly less than results of other references [ 14 , 21 , 24 , 37 , 45 ]. The authors made comparisons with previous results, and this study optimized the design of the microstructures of the LGP, the uniformity of which could be the most effective BLM application.…”

Section: Resultscontrasting

confidence: 72%

“…The average luminance and luminance uniformity of LGP were 2352.8 cd/m 2 and 92.4%, respectively. Quesada et al [ 46 ] investigated all-glass, micro-groove arrays etched into a glass LGP surface. Luminance uniformities in excess of 80% for none-point and 75% for 455-point measurements were achieved with 1.2% extraction efficiency per groove.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

et al. 2021

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This study examined the uniformity of illuminance field distributions of light guide plates (LGPs). First, the authors designed microstructural patterns on the surface of an LGP. Then, a mold of the LGP with the optimal microstructural design was fabricated by a photolithography method. Micro-injection molding (μIM) was used to manufacture the molded LGPs. μIM technology can simultaneously manufacture large-sized wedge-shaped LGPs and micro-scale microstructures. Finally, illuminance values of the field distributions of the LGPs with various microstructures were obtained through optical field measurements. This study compared the illuminance field distributions of LGPs with various designs and structures, which included LGPs without and those with microstructure on the primary design and the optimal design. The average illuminance of the LGP with microstructures and the optimal design was roughly 196.1 cd/m2. Its average illuminance was 1.3 times that of the LGP without microstructures. This study also discusses illuminance field distributions of LGPs with microstructures that were influenced by various μIM process parameters. The mold temperature was found to be the most important processing parameter affecting the illuminance field distribution of molded LGPs fabricated by μIM. The molded LGP with microstructures and the optimal design had better uniformity than that with microstructures and the primary design and that without microstructures. The uniformity of the LGP with microstructures and the optimal design was roughly 86.4%. Its uniformity was nearly 1.65 times that of the LGP without microstructures. The optimized design and fabrication of LGPs with microstructure exhibited good uniformity of illuminance field distributions.

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Section: Resultscontrasting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

et al. 2021

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“…The experimental results showed that the F1-score on the two datasets reached 99.67% and 96.77%, respectively, which verified the effectiveness of the method. Quesada et al [ 27 ] used micro-groove arrays to etch a glass LGP, transforming edge-lit incident light into a uniform area output from its surface. Luminance uniformities in excess of 80% for 9-point and 75% for 455-point measurements were achieved with a 1.2% extraction efficiency per groove.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Melt Front Behavior of a Light Guiding Plate during the Filling Phase of Micro-Injection Molding

et al. 2022

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When the size of a liquid crystal display (LCD) increases, the light guiding plate (LGP) as the main part of the LCD must adopt a wedge-shaped plate to reduce its weight (the thickness of the LGP decreases because of this) and guide the light to the LCD screen. Micro-injection molding (MIM) is commonly used to manufacture LGPs. During the filling phase of MIM, the entire entering polymer melt front of the LGP should reach the end of the mold cavity at the same time. In this way, there will be no shrinkage or warpage of the LGP in its subsequent application, but it is difficult for the wedge-shaped LGP to meet these requirements. Therefore, the authors hoped to investigate MIM process parameters to change this situation. Otherwise, the LGP is easily deformed during the manufacturing process. Flow characteristics of LGPs were investigated during the filling phase of MIM in this study. Experimental and 3D numerical simulations were used to analyze the hysteresis, i.e., the advance of the polymer melt front of the LGP in MIM. Study results showed that a low injection speed caused a hysteresis effect of the plastic melt front, the solution was to increase the injection speed to improve the situation and an injection speed of 10 cm/s could achieve uniformity of the melt front in MIM. The research results showed that the filling situation of the LGP of MIM in the experiment was very close to that of the 3D numerical simulation.

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Comparison and evaluation of microchannel array machining with structured cutter

Jin

Gong

et al. 2022

Materials and Manufacturing Processes

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All-glass micro-groove light guide plate by mask and etch

Cited by 4 publications

References 7 publications

Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

Optimized Micro-Pattern Design and Fabrication of a Light Guide Plate Using Micro-Injection Molding

Analysis of Melt Front Behavior of a Light Guiding Plate during the Filling Phase of Micro-Injection Molding

Comparison and evaluation of microchannel array machining with structured cutter

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